#version 120

varying vec2 vPosition;
varying float vDeclineTime;

void main() {
    // vec3 c = vec3(0.5, 1.0, 0.6) * 1.0;
    vec3 c = vec3(1.0 / 10.0) * exp(-0.9 * vDeclineTime);
    gl_FragColor = vec4(c, 1.0);
}
